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Debian: CVE-2021-27363: linux -- security update

Severity:
4
CVSS:
(AV:L/AC:L/Au:N/C:P/I:N/A:P)
Published:
03/07/2021
Created:
03/11/2021
Added:
03/10/2021
Modified:
03/17/2021

Description:

An issue was discovered in the Linux kernel through 5.11.3. A kernel pointer leak can be used to determine the address of the iscsi_transport structure. When an iSCSI transport is registered with the iSCSI subsystem, the transport's handle is available to unprivileged users via the sysfs file system, at /sys/class/iscsi_transport/$TRANSPORT_NAME/handle. When read, the show_transport_handle function (in drivers/scsi/scsi_transport_iscsi.c) is called, which leaks the handle. This handle is actually the pointer to an iscsi_transport struct in the kernel module's global variables.'

Solution(s)


  • debian-upgrade-linux

Reference(s)

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